The king can take the opponent queen as long as it is not checked by another piece. The king can take the queen as long as she is not protected by another piece. If the attacked queen has no protection and no other useful role to play, then the king will eat her.
Aside from doing a move that keeps you in check or produces another one, the only move that cannot be executed in check is casting. The king can therefore escape from any check but cannot create opportunities for itself.
That being said, there are times when taking the queen is the best option for your king. If the queen provides security for other pieces on the board, then removing it from the game may free up options for yourself or your opponents. For example, if you are under attack and have no useful moves of your own, taking the opposing queen with your king gives you something positive to do!
In addition, some kings are more valuable than others. Some kings are able to lead their troops to victory while others are not. If your opponent has a weak king, then it may be worth checking out whether you can win the game with a checkmate in just a few moves. A king can be captured in battle or by assassination; however, an immortal king can never be killed!
The king is the most important piece on the board, commanding the entire army. Because the goal of chess is to capture your opponent's king (give checkmate), a king cannot capture a king, nor can any other enemy piece. A king can only be captured by another king.
If your Queen is guarded, which means it is on a place that another of your pieces may lawfully move to on the following step, the King cannot seize the Queen since it would be illegally placing itself in check.
The queen does not defend the king. She prevents the other queen from flirting with her guy. That's exactly what she does. The queen guards her territory.
In a monarchy, the monarch is the head of state. However, they do not have a direct hand in government administration or business dealings. Instead, they make sure that everything goes according to plan and oversee matters related to culture and religion.
In most monarchies, the monarch is also the leader of the largest political party or coalition of parties. They decide how many seats each region gets in the legislature, the parliament. Sometimes several parties agree on boundaries for regions, and sometimes they don't. In any case, it's up to the parties to work out their differences after the election. The king or queen can influence politics by giving orders to their ministers. But they usually don't try to run things themselves. That would be impossible without getting elected again.
In some cases, the monarch is the sole ruler within their country. There are two examples of this: Sweden and Spain. Neither of these countries has a president who can exercise power independently from the monarch. Instead, both have systems where the monarch can appoint and dismiss ministers, but they cannot act alone without another official.
It's undoubtedly legal, and if the Queen is defended, it's checkmate because the King won't be able to capture it. If there is nothing to safeguard the Queen, the King can simply seize her. One criterion, of course, is that your king is no longer under check following the move.
Unless the Q has a piece to back her up, of course. It is feasible, but not likely. As I already stated, the king cannot approach so near to the opponent's queen without placing the king in danger, therefore it is not conceivable, in my opinion, unless the queen is supported by a piece. Then the king can deliver its death blow.
The king is unable to seize the queen because the knight is defending her. The black bishop is powerless to stop the queen. It's a draw.